Помогите!!!!раскройте скобки, поставив глагол в нужное время. a) 1. Russian machine-builders always (to use) the latest technical achievements in their work. 2. A group of engineers already (to work out) the technology for prod...

Помогите!!!!раскройте скобки, поставив глагол в нужное время. a) 1. Russian machine-builders always (to use) the latest technical achievements in their work. 2. A group of engineers already (to work out) the technology for producing a new alloy. 3. Most waves (to reflect) from metals.
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1.Russian machine-builders always use the latest technical achievements in their work. 2.A group of engineers have already worked out the technology for producing a new alloy.  3. Most waves reflect from metals.
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